New York authorities searched a river on Monday for a 2-year-old boy who vanished last month and is now believed to be dead.

The NYPD is now considering the possibility that Montrell Williams’ 20-year-old father might have thrown him into the Bronx River, according to WABC. Williams disappeared on May 10, and surveillance footage allegedly captured him walking near the river with his father.

At the time of his disappearance, Williams was with his father during a custodial visit. According to WABC, an argument occurred between Williams’ paternal grandmother and her son on the day the toddler went missing.

The grandmother reportedly approached the police the day following the confrontation. On Monday, the missing boy’s mother also reached out to law enforcement after questioning the 20-year-old about their son’s location and receiving an alarming response.

Sources told WNBC that Williams’ mother spotted her son’s father on the street in Manhattan on Saturday and confronted him about their son. The father was arrested after he allegedly pulled a knife on her, leading her to call the cops.

Sources claimed it was during that incident when Williams’ father said he threw their son in the river. Police said they do not believe Williams’ mother, who is 17, knows where her son is.

Williams’ father appeared in court on Monday, for an arrest warrant that was filed after he failed to return his son to his mother. A judge sent him back to jail when he refused to reveal his son’s whereabouts, according to WABC.

Despite this, Williams’ father has not been criminally charged in connection with his son’s ongoing disappearance. Divers conducted another search at the river on Tuesday.

[Feature Photo: NYPD]